Reservoir pen



June 21, 1927.

Inventar: Mir KNMI@ v Patented Jane 21, 1927.

UNI-TED STATES 1,633,111 laajralal OFFICE.

Trmonon xovcs, or Banana', GERMANY.

RESERVOIR PEN.

Applicationv led July 9, '1928, B erial No. 121,458, and.l in GermanyJuly 11,- 1925.'

The usual type of. reservoir pen has recesses. in the two sides of thefeedsbar behind Athe nib,` these recesses forming -,side chambers whichaccommodate excess ink when the pen is in use. These side chambers are,not alwaysof suicient capacity to receive the overfiow, and itis theobject of this invention to provide additional accommodation for excessink when' thepen is in use. According to the invention, the feed-bar 1sprovided with an overflow chamber at-thev fore-end thereof or -with arear overflow chamber-at the back of that portion of the I feed-barwhich projects out of the `barrel .15 of the-pen or, preferably, botho'f these overflow chambers are employed. The overflow chambers are thussituatedin positions notv heretofore utilized for this purpose,althoughthese positions'are particularly "suitable, being located lowdown when the pen is in use.

The overflow chamber at the fore-end of the feed-bar" occupies thelowest position when the pen is in use andpreferably extends up to thepointed end of the feed-bar, that is to say, up to the nib, so that itis, at least at its lowest point, indirect communication with the inkfeed.- Side passages may connect the fore-chamber with the usual sideoverflow chambers behind the= nib. The overflow `chamber at lthe back ofthe feedbar preferably forms a continuationof the 4 turned to return 'tothe inkreservoir, the rear 'overflow chamber and also the side overflowchambers communicate with the usual capillary ink grooves in the bottomof the longltudinal air channel in the feed-bar vbyaperture'ssufliciently small't prevent 'the passage ofair. These'apertresserve to re.

turn `the ink from the overflow chambers to the reservoir when the penis upturned. 1he aforesaid apertures open into the mid- "dle oftheaper'tured surface, that to say,

the overflowschambers when the pen is up-v they are not arranged at acorner, but in a l flat wall/or surface. In consequence thereof,

whenthefpen is in the writing position,'therc is insuicient capillaryattractibn in these apertures to overcome the surfacetension of the inkand therefore the ink does not escape-through the apertures into theoverflow chambers when writing. Moreover these apertures are so shortthat they do not readily clog. i i

The accompanying drawings illustrate two examples of my invention by wayof.

explanation. Fig. 1 is a part longitudinal ksection -through the endlofa reservoir pen having a retractible nib and feed-bar.

Fig. 2 is a similar view ofn a pen having a fixed nib and feed-bar. Fis. 3 andfl are cross-sectional views on the llnes 3 -3 and 4 4 of Figsf1 and 2 respectively.

On the drawings, A1 designates the pen i barrel, B the feed-bar and Fthe, nib. The

feed-bar B has the usual air channel C, in

the bottom ofwhieh are formed the ordi--` ,nary ca illary` ink groovesD. The' feed-bar as the usual recesses or 'side overflow B also chambersE "in both sides of it.

Referring now to\Fig's.--1 and 3, the back of the feed-bar B (remotefrom the nib) is 'provided with a broad axial chamber G open to theouter air through a lateral opent. ing J close to the end of the chamberG nearer the ink reservoir. .An apertured partitlon or plate H dividesthe chamber G into two compartments and projects beyond the inclinedend. face of the feed-bar, the 'outer end of the partition H beingsecured to a curved cover plate K which, with the inclined end face ofthe feed-bar, forms a fore-chamber L open at each' side. Thisfore-chamber extends up to the nib F, where yit is in directcommunication with the ink feed. =It also-communicates with the sideambers El through lateral passages M.

he chamber G and the side chambers E also ,communicate with the inkgrooves D b small orifices B andI O respectively, whic will not allowairto pass through, but enable "the ink retained in the chambers to returnto the in k re `servoi1 when the pen is upturned. j j

In theconstruction shown -in Figs. 2 and 4, the back of the feed-bar Bis formed with longitudinalkgrooves or cavities S separated from oneanother by -a longitudinal web R and covered by a plate T, which iscurved at' having a longitudinal overflow chamber in its fore end toform, with the inclined end the back of the projecting portion' of theface of the feed-bar B, the open-sided forefeed-bar, said longitudinalchamber formchamber L. Near the other end, theplate ing a continuationof the rear end of the T has an aperture J whereby the cavities Soverflow chamber on the inclined-end of the communicate' with the outerair. The forefeed-bar and a covering member extending chamber Lcommunicates with the side over both the end chamberand thelongichambers E through passages M and the tudinal chamber andl lhavingan air inlet .cavities S communicate with the side chamaperture at itsinner end.

bers E through passages N. The-side cham.- 8. A 'reservoir -penfomprising a holder, a

bers `E 'communicate in turn with the inkt feed-bar adapted to projecttherefrom and grooves D through small orifices O which having aninclined outer end, a nib adapted lprevent the passage of air, butpermit the to bear against the longer side of the outer ink to return tothe ink reservoir. end portion of the feed-bar, an air channel Claimsi'extending along the nib-side of the feed- 1. A reservoir pen comprisinga holder, a bar and having capillary ink grooves along feed-bar adaptedto.. project therefrom, a the bottom of said channel, side chambers innib adapted to bear against one side of the said feed-bar to receiveoverflow ink, a coverouter end portion of the feed-bar, an air ingmember extending over the inclined end channel extending along the nibside of the of the feed-bar to provide a space between feed-bar andhaving capillary ink Igrooves the two, said space extending from the nibalong the bo'ttom of said channel,l side chain to a rear airinlet,andink return passages bers in said feed-bar to receive overflow ink,connecting said space to-the side chambers.F and an overflow chamber inthat part of the 9. A reservoir pen comprising a holder, a projectingportion of the` feed-bar away feed-bar adapted to project therefrom andfrom the nib, said overow chamber being having an inclined outer end, anib adapted adapted at its outer end to receive overflow to bear againstthe .longer side ofthe outer' ink and having an air inlet at its innerend. end portion of the feed-bar, an air 'channel i 2. A reservoir pencomprising a holder, a extending along the nib side'of the feed-barfeed-bar adapted to project therefrom and and having capillary inkgrooves along the having an inclined outernend, a nib adapted bottom.of` said channel, side `4chambers in to bear against the longer side ofthe outer said feed-bar to receive overflow ink, a`

side chambers and over 'a curved plate over said vinclined end.

e feed end portion of the feed-bar, an air channel longitudinal recessinthe back of the proextendin along the nib side of the feedjectingportion of the feed-bar and extendbar and aving capillary ink groovesalong lng from the inclined end thereof, an overthe bottom of saidchannel, side chambers How chamber formed on the inclined end of in saidfeed-bar to receive overflow ink, and said feeuiybar, an air inlet atthe inner end an overflow chamber formed on the inclined aidlongitudinal recess, and ink return end'of said feed-bar, said overflowcha er passages connecting said recess with the ink extending rearwardlyfrom the/nilnd havgrooves in the feed-bar.' v mg an air inlet at itsreaiid. 10. A reservoir pen comprising aholder,

3. A reservgir/pen/ as specified in claim 2 a feedebar adapted toproject therefrom having afloigitudinal overflow chamber in and havingAan inclined outer end, a nib the back of the prbjecting portion of theadapted to bear against the longer side of feedibar, said longitudinalchamber forming the outer end )portion of the feed-bar, an acontinuation of the rear endk of the overair channel extending along thenib side of flow chamber on the inclined end of the feed- .the feed-barand having capillary ink bar and having an air inlet at its inner end.grooves ',along the bottom of said channel, 4. A reservoir n asspecified in claiin 1 Side Chambers in said feed-bar to receive havingink-retur vpassa es connecting the Overflow mk, a 10l}g1tudmal recess 1hthe ow chamber with back ofthe prolecting portion of the feedthe'inkgrooves, said passages being so-small as to reventjthe passage of air. A

5 reservoir enas specified in claim 2 inclined end of said .feed-bar, anair in let having the over ow chamber-- formed beat the inner end ofsaid longitudinal recess,

`Jween the inclined end, of the feed-bar land. and ink return PassagesFermeeting-the side chambers and longitudinal recess res c- 6. Areservoir n as specified in V`claim l tively with the ink greeveein thefeed' er, wherein the overdw c hamberis formedv by and a lo 'tudinalrecess in theouter end of the chambers and, the ser@ overflow chamber'ligir, of relatively large cross-sectional The, fore 0mg Speeleatlenslgned et Ber' lin this 18t day o f June, 1926. 2

THiionon Kovacs.-

area.

7. A reservoir pen as specified in claim 2A ar and extending from theinclined endl thereof, an overflow chamber formed on the connectingpassages 'between the side

